The dynamic characteristics of a diamagnetic levitated electrostatic motor

Diamagnetic Levitation emerges as a promising approach to tackle this friction issue. Due to the challenges of friction in micro motors, diamagnetic levitation emerges as a promising approach to tackle this friction issue and is essential in further developing high-speed, low-energy micro motors. Diamagnetic Levitated Electrostatic Motor has huge potential for development with the advantage of frictionless and passively stable levitation. This paper focuses on the model of the dynamics parameters of diamagnetical levitated rotor in order to accurately calculate the dynamic response of the rotor, which is important for optimising the performance of diamagnetical levitated electrostatic motor. Therefore, this paper first establishes the kinetic equations of a diamagnetic levitated electrostatic motor and proposes a method for correcting and identifying the magnetic field parameters of permanent magnets based on the equivalent current model. Then, the diamagnetic force on the suspended rotor is modeled, which leads to the investigation of the distribution of the equivalent stiffness in the rotor dynamics system. The electromagnetic forces that impede the motion of the levitated rotor are then modeled based on the principle of electromagnetic induction, thus exploring the distribution characteristics of the damping parameters in the kinematic equations. At last, The radial vibration characteristics of the levitated rotor during operation are investigated by means of numerical simulations, and relevant experiments are designed to verify them.